Vacuum capacitor



FIG. 1 is a front upper perspective view of a vacuum capacitor showing the new design;

FIG. 2 is a front lower perspective view of the vacuum capacitor showing the new design;

FIG. 3 is a front elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a left side elevation thereof, the right side elevation being symmetrical thereto;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a vacuum capacitor, as shown and described. 